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Posted by
May Ramallosa

Does the enzyme catalase contain sulfur or thiols?

Daniel Candler  Follow

Sure does. Just the binding side of human catalase contains at least 4 cysteines (an amino acid that bears a thiol) and 10 methionines (another amino acid that contains a methyl thio ether). There are another 24 cysteines and 72 methionines in the rest of the enzyme. Below is a pretty picture of the enzyme.

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